Process for carroting hairs



. moved therefrom.

' TArs CHARLES PIGHARD, OF PARIS, FRANCE, ASSIGNOR T0 LA SOCIETE PICHARD FR,

0F PARIS, FRANCE. I

rnocnss non. CARROTING ams.

No Drawing.

of cold. The skins in the hair are brushed with pure water or water to which an antiseptic (formaldehyde) has been added to preserve the hair from the action of mites.

They are placed in heaps, hair against hair for several hours to allow the liquid to penetrate the cells and intothe medullary ducts ofthe hair. t

'The'hide is then submitted to the action of sufficient cold to freeze the water which has penetrated the cells and the medullary ducts of the hair. r a

As the hair is not supported externally by a strong coating of ice, the action of the ice formed in the interior of the hairs causes the latter to burst in certain parts and thus improves their felting properties.

The cold may be produced by any suitablemeans, for example the hides may be immersed for some seconds in liquid air, nitrogen or oxygen. 4

The hides are first dried in the air and subsequently stove dried.

It should be well understood that this treatment can be applied not only to hairs which still adhere to the hides or skins but I equally well to hairs which have been re- What I claim and desire to secure by Letters Patent is: v

1. The process for-carroting hairs intended to be used in the manufacture of felt which comprises causing liquid which will expand upon freezing to penetrate the cells and medullary ducts of the hair and freezing said liquid.

2. The process for carrotin hairs intended to be used in the manu acture of felt which comprises. causing liquid which will expand upon freezing to penetrate the cells and medullary ducts of the hair and freeze ing said liquid by the action of a liquid ob tamed in the liquefaction of air.

Specification of Letters Patent. Patented June 13, 1922,,

Application filed May 3, 1921. Serial No. 466,512.

3. The process for carroting hairs intended to be used in the manufacture of felt which comprises causing water to penetrate the cells and medullary ducts of the hair and freezing said Water.

4. The process for carroting hairs intended to be used in the manufacture of felt consisting in brushing skins in the hair with water, causing said Water to penetrate the cells and medullary ducts of the hairs and freezing said water. r

5. The process for carroting hairs intended to be used in the manufacture'of felt consisting in brushin skins fin the hair with a liquid, which w1ll expand upon freezing,"

causing said liquid to enetrate the cells and medullary ducts of t e hairs and freezing said liquid.

6. The process for carroting hairs intended to be used in the manufacture of felt consisting in brushing skins in the hair with a liquid containing an antiseptic, which will expand upon freezing causing said liquid to penetrate the cells and .medullary ducts of the hairs and freezing said liquid.

7. The process for-carroting hairs intended to be used in the manufacture of felt consisting in brushing skins in the hair with a liquid, which'will expand upon freezin causlng said' liquid to penetrate the cells an medullary ducts of the hairs and steeping said skins in a liquid obtained in the liquefaction of air.

8-. The process of carroting hairs intended to be used in the manufacture of felt consisting in brushing the hairs of skins with a li u-id which will ex and upon freezing and freezing the liqui with which the hair has. been brushed;

9. The process of carroting'hairs intended to be used in the manufacture of'felt consisting in, brushing the hair of skins with a liquid which Will expand upon freezskins with a liquid which will expand upon freezing, piling said skins in heaps with the hair side of each against the hair side of another, and allowing the heaps to stand unwhich will expand upon freezing to penetrate the cells and medullary ducts of the hair and freezing said liquid by the action of a liquid obtained in the liquefaction of air.

In testimony whereof I have signed this specification in the presence of two subscrib- 20 ing witnesses. v

CHARLES PICHARD.

Witnesses:

CHARLES LEON LOIsEL, PIERRE MAURAND. 

